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As tilte,when i turn on MCU,it can run the relay,and the relay on,then relay on the valve.But i face a very critical problems,MCU very hot.I'm using transistor as switch to turn on my relay!......Please help me....neary cry le
before my 5v to MCU circuit,i got put a 10k resistor.Is that my MCU circuit must have more current?? But the way, why my relay and valve still can function,and cause the MCU very fast. If i just turn on relay,but the valve i off it,then my MCU will be fine........Please help me,3 more days i need to demonstration my project.